Seems like. An invasion of some kind, that I suppose unites the three tribes?
Yeah if some stuff may or may not happen in the present day I could totally see this hinting at a big invasion of Themyscira. Especially with Yara appearing, Diana missing, and Hippolyta joining the Justice League.
"It's fun and it's cool, so that's all that matters. It's what comics are for, Duh."
Words to live by.